Just noticed Eben put up some designs for the Write activity:
http://wiki.laptop.org/go/Write
It uses a tabbed toolbar, so if we need many items we could adopt this (not that I think we would). Here is the toolbar design separated:
<http://wiki.laptop.org/go/OLPC_Human_Interface_Guidelines/ The_Sugar_Interface/Toolbars>
Also, he published the style guides for widgets (color pickers, text input, sliders etc):
<http://wiki.laptop.org/go/OLPC_Human_Interface_Guidelines/ The_Sugar_Interface/Controls>
- Bert -